ES2285104T3 - METHOD, SYSTEM AND NETWORK ENTITY FOR THE TRANSMISSION AND RECEIPT OF DATA WITH HEAD PROTECTION. - Google Patents

Abstract

Method for data transmission, comprising: - placing a segment of data (103, 104, 105, 400) in a two-dimensional data structure (100) that has first directional arrangements (101, 102) and second directional arrangements (200), said first directional arrangements being perpendicular to said second directional arrangements, and placement being made with respect to said first directional arrangements; characterized in that - an indication of placement in the data structure is added to at least a part of a heading of said data segment; - a data protection coding is provided for at least part of the header; - said data protection coding is added to said data segment; and - said data segment is transmitted.

Description

Method, system and network entity for the data transmission and reception with protection from headings

Technical Field of the Invention

The present invention relates to systems, methods, and network entities for the transmission and reception of data through a communications link.

Background Information

The services used in mobile terminals Handheld require a relatively small bandwidth. The estimated maximum bit rate for continuous video streams that make use of advanced compression such as MPEG-4 is of the order of a few hundred kilobits per second, the 384 kbps being a practical limit being derive from the 3G environment. However, some other types of services, such as downloading files, may require a significantly higher bandwidth. For this reason, there is the Need for some flexibility.

Broadcasting broadcasts have a tradition of almost a century in radio. Even with the TV, the story goes back to the 1930s. The broadcasts of broadcasting have been successful worldwide by bringing the entertainment and information to mass audiences.

The latest advance in broadcasting is the digitization of both radio and TV. The digital radio does not It has gained a lot of acceptance in the market. However, many they trust that digital TV will bring new advantages and services for the consumer and, as a consequence, will generate new sources of revenue for the broadcasting industry. However, the Basic concept of the TV service itself has not varied much. By On the contrary, TV survives in the same way as in the past even in cases where it has been digitized.

The data is formatted using, for example, a multiprotocol encapsulator according to Section 7 of the European Standard EN 301 192 "Digital Video Broadcasting (DVB); DVB specification for data broadcasting. "The encapsulated data is sent by the multiprotocol encapsulator to a broadcast transmitter digital to broadcast a signal to the receiver of digital broadcasting.

It indicates that information can be found additional reference to the DVB, for example, in the following document  ETSI (European Telecommunications Standards Institute), incorporating each of them by way of reference to the present document:

ETSI EN 300 468 "Digital Video Broadcasting (DVB); Specification for Service Information (SI) in DVB systems ".

The latest broadcasting devices have raised the need to take into account the power consumption in the receiver, and some efforts have been made to reduce the power consumption in the latter. However, this option has created new challenges for the transmission / reception of Power-saving broadcasting: the air interface. Because the need for power saving, which results particularly  relevant to a mobile environment, the air interface offers a greater challenge than in traditional broadcasting.

One of the solutions has consisted of Enter corrections of data errors at reception. Do not However, mere correction of data is not enough, since it leaves too much responsibility for simple correction, in relation with the behavior of the data correction method and the behavior of the receiving device. For example, a single bit error can relegate a high amount of reception from reception data, which leaves a correction task too large for the data correction method of the receiving device.

WO 01/86905 discloses a basic broadcast packet structure of the mentioned type in which successive data packets comprise, in addition to common heading, a sequential list of fields that contains a description of the data, and a field that contains a part of the data.

Taking into account the various limitations inherent in broadcasting, it would be desirable to avoid or mitigate these and other problems associated with technical systems previous. Thus, there is a need to focus on the error correction for transmission characterizing parts of mobile digital broadcasting.

Summary of the invention

At this time, they have invented a method and provision for a protection mechanism of headings with a view to mobile digital band transmission wide

According to one of the aspects of the invention, provides a method for data transmission, which understands:

- place a segment of data in a structure of two-dimensional data that has first provisions directional and second directional provisions, in which said first directional provisions are perpendicular to said second directional provisions, and in which the placement is made with respect to those first provisions directional;

- add, at least a part of a heading of said data segment, an indication of placement in the data structure;

- provide a protection coding of data for at least part of the heading of said segment of data;

- add said protection coding of data to said data segment; Y

- transmit said segment of data.

According to a further aspect of the invention, provides a method for receiving data, which comprises:

- receive one or more data segments;

- identify a heading in each of the segment or segments of data received;

- identify a protection coding of data in each heading of said data segments;

- check each of these headings in relation to errors based on said coding of Data Protection; and in which said heading is free of mistakes;

- place the associated received data segment to error-free header in a data structure two-dimensional which has first directional arrangements and second directional provisions, in which said first directional provisions are perpendicular to those second directional provisions, and in which the placement is performed according to indications received of placement in the data structure in the header received.

According to still an additional aspect of the invention, a system according to claim 14 is provided.

According to still an additional aspect of the Invention, a receiver is provided, comprising:

- means for receiving one or more segments of data;

- means to identify at least one heading in at least one of the segment or segments of data received;

- means to identify an encoding of data protection in at least one heading of said data segments;

- means to check at least one part of at least the heading in relation to errors based on said data protection coding; Y

- in which said heading is free of mistakes;

- means to place the data segment received associated with the error-free header in a two-dimensional data structure that has a first directional provisions and second provisions directional, in which said first directional provisions are perpendicular to these second directional provisions, and in which the placement is carried out according to indications received from placement in the data structure in the header received.

According to another additional aspect of the invention, provides a transmitter according to claim 16.

In some embodiments, it is provided a method and a system for transmission / reception, a node transmitter and a receiver node for a digital band transmission wide that contains at least one segment of data transmitted in a time division setting. One is provided data protection coding for a header of a package of said broadband digital transmission along with a multi-level data protection coding of several packages.

Certain embodiments of the invention are used for digital broadband transmission based on bursts of segments or data packets for a mobile environment.

Advantageously, the heading can be protect independently, so that the header is can identify, analyze, and verify in relation to errors of data independently from other parts of the Broadband digital transmission. Resources are saved in relation with higher level coding for more data entities larger than those defined by the heading.

To better understand the present invention, refers to the following description, considered together with the attached drawings, and its scope will indicate in the attached claims.

Brief description of the drawings

The invention will be described below, by way of example only, referring to the drawings attachments, in which:

Figure 1 represents an example of a matrix with time segmentation and a high level FEC system in the which principles of embodiments of the invention,

Figure 2 represents another example of the matrix with a correction of CRC-32 data errors in the which principles of certain forms of embodiment of the invention,

Figure 3 represents a matrix with a header protection with another CRC according to certain forms of embodiment of the invention,

Figure 4 shows how the code is added error detection / correction at the end of the heading of the MPE section according to other embodiments of the invention,

Figure 5 represents a diagram of the stages illustrative involved in the transmission of data according to certain embodiments of the invention,

Figure 6 represents a diagram of the stages illustrative involved in receiving data according to certain embodiments of the invention,

Figure 7 represents a general architecture of the system in which the principles of certain can be applied embodiments of the invention,

Figure 8 represents a block diagram function of an illustrative node in certain embodiments of the invention.

Detailed description of the embodiments

Digital Video Broadcasting (DVB) offers a Broadband transmission channel with high bandwidth in which distribution is typically done by diffusion general, multicast or alternatively unicast. The channel of Broadband transmission can offer several services to a user of said system. To obtain the various services appropriate data corrected with a view to Get a correct reception. The DVB offers applicable principles, and preferably, in the invention embodied in one of the realizations a Digital Terrestrial Video Broadcast is applied (DVB-T). Alternatively, to the DVB for an environment mobile is referred to in this description as DVB-X Thus, as used herein. document, the term transmission can refer to a general broadcast, multicast, or unicast, and data may include, but are not limited to, data encoded in the IP protocol Preferably, the IP service data received at through the DVB-T are intended for reception mobile.

Preferred embodiments of the invention provide a method, a system, a transmitter and a receiver that define a header protection mechanism for the protocol of the MPE section (Multiprotocol Encapsulation) DVB, which can be used in mobile reception DVB-T The expression MPE section is doing reference in this case to a proposal for the use of bytes 1 to 5 of the MAC (Media Access Control) of the MPE section for transport real-time information related to bursts of time segments Through the use of a protection mechanism of headings together with an FEC (error correction towards Forward) high level, there is a way to improve significantly the mobile digital reception capabilities of broadband data In this way, header protection used together with the high level FEC in the DVB provides a advantageous solution for mobile DVB reception of burst data. As a high level FEC, for example, Reed coding is used Solomon

According to certain preferable embodiments, all packages that have an MPE section header unaltered can be placed in a matrix for a correction of higher level errors such as the FEC. The matrix has addressable digital data storage positions broadband mobiles for the correction of the data entity of higher level through the FEC process.

In the receiver, the package is placed in a buffer, a heading is identified and it is check for errors using a code error detection / correction, such as, for example, the CRC (Cyclic Redundancy Check) for data header received. If the detection / correction code of Errors (for example, the CRC) indicates a value substantially correct or OK, the address and the package included are extracted The heading is placed in the matrix.

Advantageously, the need to intermediate storage is very small since it is only it is necessary to store the data of the header before loading the data into the array. He header can be as small as, for example, 12 bytes.

Preferably, when protecting, for example, 12 bytes in the MPE section header with a code of error detection / correction (for example, the CRC), the overall performance of the high level FEC. One of the reasons for this improvement may be that the altered packages can be placed in a correct position within an FEC frame. On the other hand, it It can reduce the memory usage on the receiver. One of the reasons from this situation it may be that there is no need to store the complete package (for example, max. 4 kB) before said complete package can be placed in the frame FEC.

Some embodiments of the invention apply in DVB the principle of data transmission with time segmentation Usually, the transmission system DVB provides a bandwidth of 10 Mbps or even greater. This situation provides a possibility to significantly reduce the average power consumption of the DVB receiver by introducing a scheme based on time division multiplexing (TDM). To the introduced scheme is called time segmentation. The idea of time segmentation consists of sending data in bursts using significantly higher bandwidth compared to the bandwidth required if the data were transmitted using a static bandwidth Within a burst, the time is indicated for the beginning of the next burst (delta-t). Between bursts, service data is not transmitted, allowing that other services use bandwidth that would otherwise be assigned for the first service mentioned. This situation enables a receiver to remain active only a fragment of time, while receiving bursts of a requested service. In in case the handheld mobile terminal requires a speed constant lower binary, this option can be provided by a Intermediate storage of bursts received.

Therefore the data is transmitted in a burst, typically a short one, using the high bandwidth of the DVB Some similarities with the principle of division in time. The receiver can be turned off between bursts to save power. Burst data is downloaded in a buffer and are subsequently applied for use. Bursts can be repeated at intervals in which, thus, the time of the next bursts announces it, for example, the factor delta-t. The high level FEC is in the system to ensure better packet feed not altered for the digital broadband system. So advantageous, by using the protection mechanism of headings in such a way that all the packages they present a substantially correct heading can be positioned in the matrix along with the error correction coding of higher level for the matrix, in that matrix it can be placed in a correct position any package that may be altered. For this reason, the correction performance of higher level errors and also the performance of the Full mobile DVB reception / transmission.

Going back to the structure of the mobile digital transmission of broadband data in some ways In accordance with the invention, the MPE section is protected by a CRC-32 code. The MPE section package It can be up to 4 KB in size. The MPE section package includes an MPE section header and payload of MPE section. The header of the MPE section contains 12 bytes. Assuming a single byte error in the MPE section package of 4 kB, the probability that this error is in the Package header is only 0.3% (12/4096). For him Otherwise, the probability of having a single byte error inside of the payload of the MPE section is 99.7%. For this reason, it is very advantageous to concentrate on the heading in the error correction at the reception. The additional advantage is in addition to that based on the identification of the heading, You can get the address / position in the matrix. For this reason, it's easy to place header data in the array and The correct payload. There are no large sections in the matrix of fill data, since the address of the header points to the position of the matrix. This situation is beneficial now that lightens the work of the FEC process.

Some embodiments of the invention apply the matrix. A transmission node creates and / or accesses a two-dimensional array of addressable storage positions. In the two-dimensional matrix they can be loaded, following a column configuration, packages corresponding to data to transmit on the node, typically in a specific burst. Such packets can be, for example, IP packets. By consequently, the content of a loaded package occupies one or more addressable storage positions of one or more columns. The high level FEC can be calculated with respect to each row of the two-dimensional matrix. Therefore, the receiving node, such time after receiving indications from the matrix when receives, for example, mobile broadband digital transmission, you can create and / or access the two-dimensional matrix corresponding to the matrix created by and / or accessed by the transmitting node.

The following examples describe the load, addressing, and sizing of matrices two-dimensional in some other embodiments of the invention.

The two-dimensional matrix of the mentioned type previously it could be loaded, according to several embodiments of the present invention, in different ways. For example in embodiments in which the load must be at the level of columns, the implementation could be such that it is loaded only one packet (for example, one IP packet) per column.

For such embodiments, the size of the rows and / or columns of the matrix could be selected from such so that a column was able to contain a package of the size maximum. In the event that a package or similar item loaded in a column had a size smaller than the maximum, the part remaining column could be filled with "data from padding ". As a specific example, the remaining part could be fill with zeros.

The illustrative package can be sized to maximum, so that the column in which it resides is not added fill data. On the other hand, the package may have a size less than the maximum, and therefore, data from padding to your column such that the package combination and Fill data occupies the entire column. It is also possible that one or more complete columns contain only fill data. These columns can be placed before, between, or after columns that contain data, or you can use a combination of the same.

As another example of loading in various ways of realization in which the load must be at the column level, the implementation could be such that in the case of a package not will fully occupy the column in which it was loaded, the column load could continue with the next package to load into the array In addition, in the case where a package is is loading in a column could not fit completely in that column, those parts that did not fit could be placed in one or More additional columns.

Such functionality could be implemented, by example, so that when a specific package did not fit entirely within a column, the column would be filled with package content to the last addressable item (for example, the column element that presents the most address high at the row level) of the column, and the rest of the package is could place in the next column, starting with the first addressable element (for example, the column element that present the lowest row level address) of that column.

Returning to Fig. 1, a digital transmission broadband mobile such as the DVB-X system with time segmentation and a high level FEC can be considered as provided by way of example. The system according to a matrix (100) of Fig. 1 would have to process a 2 Mbit FEC frame in the receiving side In fig. 1, illustrative package 103 does not fill completely column 101 in which it was loaded, and therefore the rest of column 101 is loaded with parts of package 104. No However, since package 104 cannot fit completely inside of the part of column 101, the rest of that package is placed in column 102. The value of the frame address in the package header can define a starting position for each packet / data section (MPE) (105) within this frame 2 Mbit FEC. This starting position (address) can be transmit within the bytes of each section header (MAC) data (MPE).

In one of the embodiments of the invention, only payloads of MPE packets according to the address of the MPE packet header and packet headers are discarded. This means that the FEC matrix comprises IP data packets and data bytes of error detection / correction.

On the receiving node, it can be analyzed if each MPE section received (105) is correct before the node receiver can place this package in this 2 Mbit frame for the FEC calculation. The reason for this option may be that you should have a certain type of security that the information on the start address of the received package has been received correctly. In the event that the package is placed in a wrong position within the 2 Mbit FEC frame, this it would mean that the entire plot will be altered, and after this The data is no longer useful for your application.

Turning next to Fig. 2, when using a approach based on the CRC-32 DVB, each package section (105) (for example, max. 4 kB) should be stored in intermediate form before placing the section package (105) in the FEC frame. In the event that there is a single bit error within The payload of the section should continue to be discarded. package since there is a danger that the starting address of the package has been altered. This may mean that the site corresponding to this package has been left empty and the FEC (1024 FEC rows) must be able to correct the entire package. This means that a lot of effort / correction capacity is lost FEC, since those empty holes that are left in must be repaired the inside of the FEC frame. This situation occurs only due to the 0.3% probability that the heading is altered It should be noted that in the FEC frame, there may be up to 1024 independent FEC algorithms. This means that, although several packages are missing, also an individual FEC algorithm (it is say, a row) has a lot of holes to fix. Thus, the FEC correction capability for an FEC row (200) is overcome quite easily. The MPE section package (105), when there is 1 altered byte, it cannot be placed in the frame since with the CRC-32 you can't be sure if The error is in the package start address. For the therefore, the site for that package is left empty. The dark block of matrix 100 represents data that must be corrected by FEC.

Going back to fig. 3 preferably in some embodiments in which the MPE section heading with an additional CRC code, it can analyze and verify independently if the header is correct, and place package 105 in position correct within the FEC frame. This operation can take place regardless of whether package 105 contains some errors in the payload Advantageously, the FEC correction capability it is much larger since not all bytes of the payload of the MPE section 105 are altered. In addition to this, the wrong bytes they are more or less randomly divided into different rows (it is say, rows FEC 200), which means that it is already quite difficult to overcome the correction capacity of the FEC algorithm individual. This situation can be shown in Fig. 3 since only one block of data to be corrected by the FEC matches with row FEC 200. Thus, the MPE section package 105, in which, for example, there are N bytes of payload altered, can continue to be placed in the FEC frame since it is verified if the header is correct with an additional CRC code. So advantageously, the FEC correction capability is maintained at a level much better for the individual FEC 105 row and therefore the overall performance of FEC frames is better. The dark block of matrix 100 represents data to be corrected by the FEC, the which advantageously have a size considerably reduced.

Fig. 4 shows how the code is added error detection / correction (for example, CRC) at the end of MPE section heading according to other embodiments of the invention. In Fig. 4, an example of a package is shown of the MPE 400 section that contains the section heading MPE and the payload of the MPE section. The most color block dark leaves, advantageously, some space for standardization and the systems used depending on the DVB applied. In the example in Fig. 4, the CRC code is added at the end of the MPE section heading.

Still some other embodiments of Fig. 4 can be based, for example, on the coding of error detection based on CRC-6, which Requires 6 bits of packet header. In these others embodiments, the code generating polynomial could have the following form: x 6 + x + 1 (the value of the initial residue it would consist of previously setting all the parity bits to zero). Thus, the code CRC-6 (402), which is Calculate the full heading of the MPE section (12 bytes) in which the generator polynomial is based on the equation: x 6 + x + 1, and the initial residue value: all zeros. Further, In one of the embodiments of the invention the code CRC-8. In this case, the polynomial of code generation would be, for example, x8 + x2 +1 (with the initial residue previously set all to zeros). In this case it They need eight bits of the header.

Figure 5 represents a diagram of the stages illustrative involved in the transmission of data according to certain embodiments of the invention. In step 500, they are processed encapsulation operations. In some embodiments of The present invention could use the MPE. As I also know mentioned above, said MPE could be, for example, the MPE DSM-CC. Information can be found concerning the MPE, for example, in document ETSI TR 101 202, incorporated herein by reference. Node transmitter could place in sections DSM-CC MPE packets (for example, IP packets) originally loaded packets (for example, IP packets). Then the sections DMS-CC could be placed, for example, in packages TS MPEG-2. In the embodiments, a first PID value could be associated with TS packets that carry data corresponding to the originally loaded packages, maybe modified. In step 501, the transmitter node loader performs the loading of the package and the loading of the matrix. The direction Start of the package is fed from the charger to the generation of the heading. The heading of the MPE section is added also the error detection / correction code (for example, the CRC). In step 502 the matrix is created with the correction of headers based on the detection / correction code of errors (for example, the CRC). Then, in step 504, the TS packets could be transmitted through a link such as, for example, a DVB link. Detailed operations can be base on those referred to in the examples of Figs. 1 to 4 with respect to the transmission node. A node of transmission such as a header can execute the stages and operations of the example in Fig. 5.

Figure 6 represents a stage diagram illustrative involved in receiving data according to certain embodiments of the invention. The receiving node can perform the steps referred to in Fig. 6. In step 600 receives the data packet that includes the header and payload. The heading includes the package address in the array and also the correction code of errors such as, for example, a CRC-6 code or Other error checking code. In step 601, it is performed an extraction for the reception of packages. For example, him header and payload are extracted from the data flow of the burst of data received from the mobile digital band transmission wide In step 603, it is being checked if the code of error detection / correction (for example, the CRC) of the header is OK. Preferably, it is checked in relation with data errors the header of the MPE section that contains the error detection / correction code (for example, CRC-6). Preferably, it is checked only the data part of the header of the complete package of the section. Advantageously, you can save a lot of buffer space thanks to the limited size of the heading, although keeping the heading a critical functionality and operating capacity of the reception of broadcast data. If no errors occur Substantial, the data is loaded into the receiver matrix in the step 604. Preferably, the address to address and position The data in the matrix is obtained from the header. On stage 605, the process progresses to the next section package received. In step 606 it is checked whether the section package Processed is the last. If not, the process returns to the extraction stage 602 for the respective section package in question. In step 603, if the detection / correction code of errors (for example, the CRC) indicates an error or is observed alternatively that the header is altered, in the array nothing is placed. Preferably, this situation occurs with quite infrequently since the header size is reduced, for example, 12 bytes. This provides a lightening additional for higher level correction coding such as the FEC since the plot does not have to correct large blank data holes. In step 606, if the package processed is the last one, the process ends in step 607.

In some other embodiments, after from the end, the FEC on the matrix begins to be processed. When he FEC process is ready and the data is transferred taking them from the matrix, the process can also start receiving data, process the error detection / correction code (for example, the CRC) on the header, and place packages in the array FEC.

Still in some other embodiments, encapsulation takes place in the receiving node. After having received TS packets of the mentioned type, the node could extract the DSM-CC sections transported by these packages. Then the node could extract from these sections DSM-CC packets that carry data corresponding to the header and loaded packages originally.

Although the MPM DSM-CC has described herein in transmission and reception, It will be noted that other MPE techniques could be used.

Some embodiments of the invention apply the system of Fig. 7. An End User Terminal (EUT) preferably works under the coverage of a digital network of broadband (DBN). The EUT may be able to receive a service IP based that is provided by the DBN. The DBN is based on the DVB, preferably, the DVB-X or the DVB-T for a mobile environment. The transmission of the DBN contains the array and package of the MPE section with the MPE section heading. The transmission can be based on Time segmentation Before transmission, the data is processed by the DBN. Some examples of processing have been described above in the examples of Figs. 1 to 6 Preferably, the DBN transmission is wireless or a mobile transmission to the EUT based on the DVB-X. In this way, data can be transmitted wirelessly. Headers (HE) containing IP encapsulators perform the MPE and put IP data in data containers based on the MPEG-TS The HE also performs the processing to which reference is made in Figs. 1 to 6 with respect to the node of transmission.

Still referring to the example of the Fig. 7, DVB packets according to the aforementioned manner are transmitted to via the DVB data link, preferably a mobile link or wireless The EUT receives digitally disseminated data. He EUT performs the process referred to in Figs. 1 to 6 with respect to the receiving node.

Returning to the example in Figure 8, the same represents a functional block diagram of a Terminal End User (EUT) or, alternatively called, receiver or node receiver. The EUT of Fig. 8 can be used in any all of the previous example (s) with respect to the receiving node. The EUT comprises a unit of CPU processing, a part of broadband reception or called alternatively part of multi-carrier signal reception, the which can receive, for example, a multi-carrier band signal wide such as a DVB-T signal, and an interface of UI user. The broadband reception part and the interface of UI user are coupled to the CPU processing unit. the interface UI user comprises a screen and keyboard to allow A user makes use of the receiver. Additionally, the interface of UI user comprises a microphone and a speaker to receive and Produce audio signals The UI user interface can also comprise a voice recognition module (not shown). Further, In one of the embodiments of the invention, the UI also It can be a graphical user interface. The processing unit CPU comprises a microprocessor (not shown), a memory and possibly a SW software (not shown). SW software can be Store in memory. The microprocessor controls, based on SW software, receiver operation. The operations are described in the examples of Figures 1 to 6, and are implemented, for example, by hardware (not shown). Advantageously, EUT memory can be reduced by applying the reduced heading in the burst. In addition, you can save processing capacity and receiver power since the reduced header requires significantly fewer stages of processed to be a small data block.

Referring still to Figure 8, you can alternatively apply a software implementation of interconnection or conventional software (not shown). The EUT it can be a handheld device which can be carried comfortably by the user. Advantageously, the EUT can be a mobile cell phone which comprises the broadcast receiver or the reception part of the multi-carrier signals to receive continuous broadcast transmission streams DVB-T (this situation is shown in Fig. 8 by a block of dashed lines which, therefore, it constitutes only an alternative option). Therefore it is it is possible that the EUT can interact with the suppliers of services.

Some forms can be considered in hardware preferred materialized to implement the code of error detection / correction (for example, the CRC) in the heading, for example, an implementation of records of displacement. You can also perform an implementation of Search tables for the SW. The implementation of the CRC code is A simple process.

Still in some other embodiments, CRC-32 is applied for the corresponding calculation to each package of the MPE section although there is no need of intermediate storage of any data over the payload of the MPE section. The data can be placed in memory after that the MPE header has been checked. In a little case frequent in which they must be corrected by CRC-32 all MPE packages, in this case this situation means that the 2 Mbit full FEC frame is correct and there is no need for perform the FEC algorithm at all.

It should be noted that the size of the FEC frame 2Mbit, matrix size, as well as package size of the 1024 MPE section and the MPE section heading of 12 bytes are only examples defined in the case corresponding to normalization. However, the presentation number corresponding to such cases may vary within their operations and respective functions described.

Inventions materialized in ways of realization can save power on the receiving device, what which contributes to the mobility aspect of the DVB receiver. He performance of embodiments power advantages of the invention such as saving. For example, the DVB-T or DVB-X offers a way Effective and economical of distributing data.

Although the above description contains many details, they are provided merely to illustrate the invention and should not be considered as scope limitations Of the same. In this way, it will be evident to experts in the matter that can be made several modifications and variations in the system, processes and entities of the present invention without departing from the characteristics of the invention.

Claims (20)

1. Method for data transmission, which understands: - placing a segment of data (103, 104, 105, 400) in a two-dimensional data structure (100) having first directional arrangements (101, 102) and second directional arrangements (200), said first directional arrangements being perpendicular to said second directional arrangements, and the placement being made with respect to said first directional arrangements; characterized because - is added, at least to a part of a heading of said data segment, an indication of placement in the data structure; - protection coding is provided of data for at least part of the heading; - said protection coding is added data to said data segment; Y - said data segment is transmitted. 2. Method according to claim 1, wherein the transmission of said data segment comprises the transmission of the content of each of these first provisions directional that contains said segment of data. 3. Method according to claim 1, wherein Each segment of data is a package. 4. Method according to claim 1, wherein said addition of said data protection coding is performs at least in the heading part of said data segment 5. Method according to claim 1, wherein each data segment is an encapsulation section multiprotocol 6. A method according to claim 1, wherein said data segment corresponds to data to be transmitted within a single
burst. 7. Method according to claim 1, wherein said first directional arrangements are columns and said Second directional arrangements are rows. 8. Method according to claim 1, wherein said first directional arrangements are rows and said Second directional arrangements are columns. 9. Method according to claim 1, wherein said data structure is an array. 10. Method according to claim 1, wherein the provision of said data protection coding for by at least part of said data segment comprises the coding of data protection of said heading. 11. Method according to claim 10, wherein said data protection coding comprises an encoding  cyclic redundancy (CRC). 12. Method according to claim 1, wherein said data segment comprises a protection coding of data for said two-dimensional data structure in the second address. 13. Method for receiving data, which understands: - receive (600) one or more segments of data; - identify (601) a heading in each of the segment or segments of data received; characterized because - identify (603) a coding of data protection in each heading of said segments of data; - check (603) each of these headers in relation to errors based on said data protection coding; and in which said header is error free; - place (604) the received data segment associated with the error-free header in a structure of two-dimensional data that presents some first provisions directional and second directional arrangements, being said first directional provisions perpendicular to said second directional arrangements, and placing according to indications received of placement in the structure of data in the received header. 14. System for data transfer that understands: - at least one transmitter node to transmit one or more data segments; characterized in that it presents - means in the transmitting node for provide a data protection coding for so less a part of each of the segment or segments of data; - means in the transmitting node to add said data protection coding to each of said or said data segments; - at least one receiving node to receive said data segments; - means in the receiving node for identify said data protection coding in each of the segment or segments of data received; a means in the node transmitter to place the data segments in a structure of two-dimensional data that has first provisions directional and second directional provisions, in the that said first directional provisions are perpendicular to said second directional provisions, and in which the placement is made with respect to those first provisions directional; - means in the transmitting node to add to said or said data segments an indication of placement in the data structure; - means in the receiving node for identify a heading in said data segment received; - means in the receiving node to check said heading in relation to errors; Y - means in the receiving node to place the received data segment associated with the free header of errors in a two-dimensional data structure that has some first directional provisions and second provisions directional, said first directional arrangements being perpendicular to these second directional provisions, and placing according to indications received from placement in the data structure in the header received. 15. Receiver (EUT), which comprises: - means for receiving one or more segments of data; - means for identifying at least one heading in at least one of the segment or segments of data received; characterized in that it presents - means to identify an encoding of data protection in at least one heading of said data segments; - means to check at least one part of at least the heading in relation to errors based on said data protection coding; Y - in which said heading is free of mistakes; - means to place the data segment received associated with the error-free header in a two-dimensional data structure that has a first directional provisions and second provisions directional, said first directional arrangements being are perpendicular to these second directional provisions, and placing according to indications received from placement in the data structure in the header received. 16. Transmitter (HE), comprising: - means for placing one or more segments of data in a two-dimensional data structure that has first directional arrangements and second directional arrangements, said first directional arrangements being perpendicular to said second directional arrangements, and placement with respect to said first directional provisions; characterized by - means to add at least one part of a heading of said or said data segments a indication of placement in the data structure; - means for providing coding data protection for at least part of the header of each of said data segments; - means for adding said coding of data protection to each of said data segments; Y - means for transmitting said or said data segments 17. Computer program comprising some computer program code means adapted to perform the steps of the method of claim 1 or 13 when said Program runs on a computer. 18. Computer program according to claim 17 embodied in a support readable by computer. 19. Computer readable support that includes a program code adapted to carry out the method of claim 1 or 13 when running on a computer. 20. Carrier support, for example, a signal electromagnetic, which is the carrier of the program executable by computer of claim 17.